-回國簽F1.
我從遞交材料到移民局通知補材料take了4個月。我剛剛把材料補上去,大概需要多長時間移民局會再給消息呢?
-It may take one to three months. But you are legal to stay during your F1 pending. If your F1 application is denied, just go back to China to get a F1 visa and I do not think you have a problem to get it.